1. What service does Liben offer for creating trampoline park? 2. What safety standard does your trampoline meet? Do you have any certificate for the materials you use?3. What will my park cost to fit out? Or what cost should be included in my budget?4. How much space do I require to operate a trampoline park? 5. What should I provide if asking for custom design for my park? 6. Is it easy to install the trampoline? Do you offer installation service outside China? 7. How long does it take to build the park? 8. Do you provide any ancillary products for trampoline park, such as trampoline socks?